NestJS Middleware

logging.middleware.ts

// logging.middleware.ts
import { Injectable, NestMiddleware } from '@nestjs/common';
import { NextFunction, Request, Response } from 'express';

@Injectable()
export class LoggingMiddleware implements NestMiddleware {
  use(req: Request, res: Response, next: NextFunction) {
    console.log(`start [${req.method}] ${req.url}`);
    const oldSend = res.send;
    res.send = (body: any): any => {
      console.log(body);
      oldSend.call(res, body);
    };
    next();
    console.log(`end [${req.method}] ${req.url}`);
  }
}

// main.ts
async function bootstrap() {
  app.use(new LoggingMiddleware().use);
}